Distinct faces in three rolls
A fair die is rolled 3 times. What is the expected number of distinct faces that appear? (to 2 decimals)
Show hints (2)+
- Use an indicator per face.
- P(face i appears) = 1 − (5/6)^3.
Answer
Reveal answer →Final answer
2.528 (± 0.01)
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Asked at: Two Sigma, Akuna Capital